Jason Ratcliff to serve as crew chief for Christopher Bell

Crew chief Jason Ratcliff will oversee Christopher Bell's run for rookie of the year in the NASCAR Xfinity Series next season sources told Motorsport.com.

An official announcement of the move is expected this week.

Ratcliff, who led Matt Kenseth to his 39th-career win on Sunday at Phoenix Raceway, started his career as a crew chief in 2000 in what was then the Busch Series with Casey Atwood at Brewco Motorsports. He won two races there with Jamie McMurray before joining Joe Gibbs Racing in 2005.

The 49-year-old Sumter, S.C., native enjoyed his greatest success on that tour with Kyle Busch. Together, the pair won 40 percent of their starts in 2008. They won the title the following year after posting eight wins, 23 top fives and 28 top 10s in 33 starts. In 2010, Busch and Ratcliff broke Sam Ard's record for single-season wins in the series with 13 in 29 starts.